/*
 *
 * @APPLE_LICENSE_HEADER_START@
 *
 * Copyright (c) 1999-2001 Apple Computer, Inc.  All Rights Reserved. The
 * contents of this file constitute Original Code as defined in and are
 * subject to the Apple Public Source License Version 1.2 (the 'License').
 * You may not use this file except in compliance with the License.  Please
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 * read it before using this file.
 *
 * This Original Code and all software distributed under the License are
 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, FITNESS
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/*
	File:		UserAgentParser.h

	Contains:	API interface for parsing the user agent field received from RTSP clients.
				
	Change History (most recent first):

	
	
	
*/
#ifndef _USERAGENTPARSER_H_
#define _USERAGENTPARSER_H_

#include "StringParser.h"
#include "StringFormatter.h"
#include "StrPtrLen.h"

class UserAgentParser 
{
	public:
		enum{ 	eMaxAttributeSize 	=  60 };
		struct UserAgentFields
		{
			char 					fFieldName[eMaxAttributeSize + 1];
			UInt32					fLen;
			UInt32					fID;
		};

		struct UserAgentData
		{			
			StrPtrLen 				fData;
			bool					fFound;
		};

		enum 
		{ 	eQtid 	= 0,
			eQtver	= 1,
			eLang	= 2,
			eOs		= 3,
			eOsver	= 4,
			eCpu	= 5,
			eNumAttributes = 6 
		};

		static UserAgentFields sFieldIDs[];
		static UInt8 sEOLWhitespaceEqualMask[];
		static UInt8 sEOLSemicolonCloseParenMask[];
		static UInt8 sWhitespaceMask[];

		UserAgentData fFieldData[eNumAttributes];
			
		void Parse(StrPtrLen *inStream);

		StrPtrLen* GetUserID() 			{ return 	&(fFieldData[eQtid].fData); 	};
		StrPtrLen* GetUserVersion() 	{ return 	&(fFieldData[eQtver].fData); 	};
		StrPtrLen* GetUserLanguage() 	{ return 	&(fFieldData[eLang].fData); 	};
		StrPtrLen* GetrUserOS() 		{ return  	&(fFieldData[eOs].fData); 		};
		StrPtrLen* GetUserOSVersion() 	{ return 	&(fFieldData[eOsver].fData); 	};
		StrPtrLen* GetUserCPU() 		{ return  	&(fFieldData[eCpu].fData); 		};
		
		UserAgentParser (StrPtrLen *inStream)  { if (inStream != NULL) Parse(inStream); }


};


#endif // _USERAGENTPARSER_H_
